耳石重量在澳大利亚最常见的淡水鱼--年幼硬骨鳊(Nematalosa erebi)生长研究中的实用性

IF 1.8 4区 环境科学与生态学 Q2 FISHERIES Marine and Freshwater Research Pub Date : 2024-02-05 DOI:10.1071/mf23202
Oliver P. Pratt, Leah S. Beesley, Bradley J. Pusey, Daniel C. Gwinn, Chris S. Keogh, Samantha A. Setterfield, Michael M. Douglas
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引用次数: 0

摘要

耳石是鱼类内耳中的钙化结构,对其进行分析可得出重要的生命史特征。耳石可用于计算幼鱼的年龄,方法是计算耳石横截面上可见的每日生长增量;但这种方法成本高且耗时。耳石重量是生长分析中鱼类年龄的潜在替代物,提供了一种快速的替代方法。硬骨鳊(Nematalosa erebi)是澳大利亚分布最广的淡水鱼,也是河流食物网的重要组成部分,但有关其生活史特征的出版物却很少。我们研究了根据耳石增量得出的假定鱼龄与年幼硬骨鱼耳石重量之间的关系。我们还评估了耳石重量在相对生长率分析中的实用性。线性模型显示,增量计数与耳石重量之间存在显著的正相关关系。耳石重量与体长配对后,在相对生长研究中可替代增量计数和年龄。这种方法有助于研究这一具有重要生态意义的物种的生活史形成因素。
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The utility of otolith weight in growth studies of young-of-year bony bream (Nematalosa erebi), Australia’s most widespread freshwater fish

Otoliths are calcified structures in the inner ear of fish, the analysis of which can be used to derive important life-history characteristics. Otoliths can be used to age young fish by counting daily growth increments visible in the otolith cross-section; however, this is costly and time-consuming. Otolith weight is a potential surrogate for fish age in growth analysis, providing a rapid alternative. Bony bream (Nematalosa erebi) is Australia’s most widespread freshwater fish and an important component of riverine food webs, yet its life-history characteristics are informed by few publications. We investigated the relationship between assumed fish age derived from otolith increments and otolith weight in young-of-year bony bream. We also assessed the utility of otolith weight for use in relative growth rate analysis. Linear modelling showed a significant positive relationship between increment count and otolith weight. Otolith weight when paired with body length was a reliable alternative to increment count, and thus age, for use in relative growth studies. This method can facilitate research into the factors shaping the life history of this ecologically significant species.

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来源期刊
Marine and Freshwater Research
Marine and Freshwater Research 环境科学-海洋学
CiteScore
4.60
自引率
5.60%
发文量
76
审稿时长
3.8 months
期刊介绍: Marine and Freshwater Research is an international and interdisciplinary journal publishing contributions on all aquatic environments. The journal’s content addresses broad conceptual questions and investigations about the ecology and management of aquatic environments. Environments range from groundwaters, wetlands and streams to estuaries, rocky shores, reefs and the open ocean. Subject areas include, but are not limited to: aquatic ecosystem processes, such as nutrient cycling; biology; ecology; biogeochemistry; biogeography and phylogeography; hydrology; limnology; oceanography; toxicology; conservation and management; and ecosystem services. Contributions that are interdisciplinary and of wide interest and consider the social-ecological and institutional issues associated with managing marine and freshwater ecosystems are welcomed. Marine and Freshwater Research is a valuable resource for researchers in industry and academia, resource managers, environmental consultants, students and amateurs who are interested in any aspect of the aquatic sciences. Marine and Freshwater Research is published with the endorsement of the Commonwealth Scientific and Industrial Research Organisation (CSIRO) and the Australian Academy of Science.
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